问题描述
我有一个主报告，其中包含很多信息，我需要添加一个子报告.当我运行主报表的JUnit测试时，会引发异常:
I have a master report which contains a lot of information and I need to add a Sub-Report. When I run JUnit Test of Master Report, an exception is thrown:
net.sf.jasperreports.engine.JRRuntimeException: net.sf.jasperreports.engine.JRException: The subreport is placed on a non-splitting band, but it does not have a rewindable data source.
at net.sf.jasperreports.components.table.fill.FillTable.rewind(FillTable.java:392)
at net.sf.jasperreports.engine.fill.JRFillComponentElement.rewind(JRFillComponentElement.java:171)
at net.sf.jasperreports.engine.fill.JRFillElementContainer.rewind(JRFillElementContainer.java:651)
at net.sf.jasperreports.engine.fill.JRFillBand.refill(JRFillBand.java:355)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillColumnBand(JRVerticalFiller.java:2044)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillDetail(JRVerticalFiller.java:760)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportStart(JRVerticalFiller.java:270)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:128)
at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:946)
at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:864)
at net.sf.jasperreports.engine.fill.JRFiller.fillReport(JRFiller.java:84)
at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:624)
at ar.com.qyttrade.jasperreports.ExtraMainReportTest.extraReportTest(ExtraMainReportTest.java:95)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:71)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:46)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: net.sf.jasperreports.engine.JRException: The subreport is placed on a non-splitting band, but it does not have a rewindable data source.
at net.sf.jasperreports.engine.fill.JRFillSubreport.rewind(JRFillSubreport.java:782)
at net.sf.jasperreports.components.table.fill.FillTable.rewind(FillTable.java:388)
... 35 more
我不知道此错误的目的是什么.我在明细栏中尝试使用拆分类型"和允许拆分"的每种组合，但均不起作用.我需要知道为什么会发生此错误.另一个问题是在子报表中，我有一个带有自己的数据源的表，如何将参数设置为主报表，以及子报表应如何加载此数据源?
I don't know what is the purpose of this error. I tried every combination with "Split type" and "Split Allowed" at Detail Band, but it does not work. I need to know why this error is done.Another issue is in the sub-report I have a table with it own Data Source, how set the parameters to Master Report and how the sub report should load this Data Source?
推荐答案
仅当将子报表放在标题"区域或页面标题"区域时，才会发生这种情况.因此，请将您的子报告放置在上述频段之外，因为该频段是非循环频段.
This is only happen when you Placed your subreport on Title band or Page Header band.So Place your sub report except above band because this bands are non looping bands.
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